Weather in Bahamas in September

How September compares

September is the 3rd warmest month of the year in Bahamas and ranks 37th of 134 destinations we compare for September - see where else is hot in September. Against London's average high of 18.6°C in September, Bahamas is 10.3°C warmer by day and 15.1°C warmer at night.

Daytime and night-time in September

The typical September day in Bahamas peaks at 28.9°C, but that is an average: the warmest 10% of days reach 30.1°C or more. About 100% of days top 25°C and 1 in 7 pass 30°C. Nights average 26.3°C; one night in ten drops to 25.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 32.0°C (2017-09-04) and the coldest night 23.7°C (1996-09-24).

Rain in September

Wet (more than 8 rainy days): about 20 days with 1 mm or more, 133 mm in total. Year to year it varies a lot - the wettest September was 2004 with 256 mm, the driest 2017 with 72 mm. Humidity averages 78%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in September

The sea averages 29.3°C - warm enough to swim (22°c+). Depending on the year it ranges from 28.8°C to 29.7°C. For the warmest sea here, come in August (29.7°C).

Sunshine and daylight

Around 4.6 hours of sunshine a day (estimated from cloud cover), 12.1 hours of daylight: the sun rises about 06:55 and sets about 19:14 local time in mid-September. Average cloud cover is 62%.

Is September a good time to visit Bahamas?

It is a reasonable choice: hot days but expect showers. The best months for Bahamas on our scoring are April, March, December; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct, Nov.

Hot days, warm nights and comfortable swimming

The heat is consistent rather than dependent on an occasional hot spell: days reach 25°C throughout September. Humidity averages 78%, so allow for a sticky feel and keep strenuous activity away from midday. Loose, breathable clothing makes more sense than heavy layers, and the warm nights mean little relief from the heat after sunset. If you struggle to sleep in warm conditions, prioritise air conditioning when choosing accommodation. The sea averages 29.3°C, making swimming a strong reason to go, though it will feel warm rather than sharply cooling. This month suits travellers who enjoy warmth both in and out of the water.

Expect rain to shape your plans

Rain is the main compromise, not a minor detail to overlook. With about 20 rainy days, it is sensible to leave room to move outdoor plans around and pack a light waterproof that will not feel too heavy in the heat. Sunshine averages about 4.6 hours within 12.1 hours of daylight, so long daylight hours do not mean uninterrupted sun. The monthly figures do not tell you when rain will fall or how long it will last; avoid relying on a particular part of the day being dry. September is a reasonable fit if swimming matters more than clear skies, but less appealing if your holiday depends on spending most days outdoors.